Projecting groundwater storage changes in California's Central Valley

Scientific Reports
Elias C MassoudJames S Famiglietti

Abstract

Accurate and detailed knowledge of California's groundwater is of paramount importance for statewide water resources planning and management, and to sustain a multi-billion-dollar agriculture industry during prolonged droughts. In this study, we use water supply and demand information from California's Department of Water Resources to develop an aggregate groundwater storage model for California's Central Valley. The model is evaluated against 34 years of historic estimates of changes in groundwater storage derived from the United States Geological Survey's Central Valley Hydrologic Model (USGS CVHM) and NASA's Gravity Recovery and Climate Experiment (NASA GRACE) satellites. The calibrated model is then applied to predict future changes in groundwater storage for the years 2015-2050 under various precipitation scenarios from downscaled climate projections. We also discuss and project potential management strategies across different annual supply and demand variables and how they affect changes in groundwater storage. All simulations support the need for collective statewide management intervention to prevent continued depletion of groundwater availability.

References

Jun 18, 2002·Science·William M AlleyThomas E Reilly
Oct 19, 2005·Proceedings of the National Academy of Sciences of the United States of America·Gerrit SchoupsSorab Panday
Jul 16, 2008·Ground Water·Rebecca C DobleGlen R Walker
Aug 14, 2009·Nature·Matthew RodellJames S Famiglietti
May 31, 2012·Proceedings of the National Academy of Sciences of the United States of America·Bridget R ScanlonPeter B McMahon
Feb 24, 2016·Water Resources Research·Alexandra S RicheyMatthew Rodell
Feb 24, 2016·Water Resources Research·Alexandra S RicheyMatthew Rodell
Aug 20, 2017·Scientific Reports·Kurt C SolanderRichard S Middleton

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